Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Roxana Junior High School | School | 136 | Madison | 38 51 07 N | 090 04 32 W |
| Roxana Post Office | Post Office | 136 | Madison | 38 50 46 N | 090 04 44 W |
| Roxbury | Populated Place | 272 | Lee | 41 42 02 N | 089 02 22 W |
| Roy Burden RLA Airport | Airport | 220 | McLean | 40 23 20 N | 089 04 09 W |
| Roy De Shane Elementary School | School | 233 | DuPage | 41 55 21 N | 088 08 05 W |
| Roy Elementary School | School | 197 | Cook | 41 55 08 N | 087 53 54 W |
| Roy O West House | Building | 180 | Cook | 41 47 32 N | 087 35 46 W |
| Roy Ricketts Center | School | 214 | Peoria | 40 44 22 N | 089 35 14 W |
| Roy Roberts Park | Park | 135 | Cass | 40 00 37 N | 090 24 56 W |
| Royal | Populated Place | 208 | Champaign | 40 11 34 N | 087 58 22 W |
| Royal Acres Trailer Park | Populated Place | 245 | McLean | 40 31 00 N | 088 58 35 W |
| Royal Elementary School | School | 209 | Champaign | 40 11 37 N | 087 58 06 W |
| Royal Heights | Populated Place | 177 | St. Clair | 38 32 39 N | 090 00 49 W |
| Royal Lake | Lake | 126 | Calhoun | 38 56 18 N | 090 30 06 W |
| Royal Lake | Populated Place | 190 | Macoupin | 39 06 37 N | 089 57 41 W |
| Royal Lake | Reservoir | 195 | Macoupin | 39 06 36 N | 089 58 36 W |
| Royal Lake Resort | Locale | 171 | Bond | 38 54 50 N | 089 17 33 W |
| Royal Lake Resort | Populated Place | 139 | Clinton | 38 33 56 N | 089 23 36 W |
| Royal Lake Resort Dam Number 1 | Dam | 195 | Macoupin | 39 06 41 N | 089 57 39 W |
| Royal Landing | Locale | 128 | Calhoun | 38 55 31 N | 090 30 10 W |
| Royal Landing Access Area | Locale | 128 | Calhoun | 38 55 32 N | 090 30 10 W |
| Royal Links Golf Course | Locale | 250 | McLean | 40 30 56 N | 088 55 21 W |
| Royal Oak Convalescent Home | Building | 192 | Cook | 41 53 33 N | 087 48 17 W |
| Royal Parkway Dodge Heliport | Airport | 168 | Sangamon | 39 46 00 N | 089 36 14 W |
| Royal Princess Mine | Mine | 193 | Jo Daviess | 42 18 30 N | 090 23 44 W |
| Royalton | Populated Place | 120 | Franklin | 37 52 37 N | 089 06 52 W |
| Royalton Lookout Tower | Tower | 140 | Franklin | 37 53 33 N | 089 06 19 W |
| Royalton Waterworks | Locale | 118 | Franklin | 37 51 52 N | 089 06 18 W |
| Royce School (historical) | School | 194 | Will | 41 42 26 N | 088 07 36 W |
| Roycemore School | School | 182 | Cook | 42 03 41 N | 087 40 45 W |
| Rozetta | Populated Place | 216 | Henderson | 40 56 30 N | 090 51 50 W |
| Rozetta Cemetery | Cemetery | 214 | Henderson | 40 56 21 N | 090 51 53 W |
| Ruark | Populated Place | 154 | Lawrence | 38 35 30 N | 087 49 52 W |
| Rubart Cemetery | Cemetery | 212 | Adams | 39 47 55 N | 090 55 37 W |
| Rubican Cemetery | Cemetery | 185 | Greene | 39 22 17 N | 090 10 12 W |
| Rubicon Church | Church | 185 | Greene | 39 22 18 N | 090 10 14 W |
| Rubicon Creek | Stream | | Greene | 39 18 32 N | 090 11 53 W |
| Rubio Woods | Woods | 194 | Cook | 41 38 17 N | 087 46 02 W |
| Rubloff Intensive Care Tower | Hospital | 180 | Cook | 41 47 19 N | 087 36 11 W |
| Ruby | Populated Place | 226 | Winnebago | 42 18 57 N | 089 04 15 W |
| Rucker Cemetery | Cemetery | 180 | Morgan | 39 50 31 N | 090 11 32 W |
| Rucker Chapel | Church | 235 | De Witt | 40 15 40 N | 088 48 47 W |
| Rudd School (historical) | School | 208 | Livingston | 40 44 40 N | 088 26 54 W |
| Ruddell School (historical) | School | 150 | Adams | 40 06 41 N | 091 23 56 W |
| Ruddy School (historical) | School | 213 | Iroquois | 40 30 02 N | 087 53 55 W |
| Rudement | Populated Place | 121 | Saline | 37 38 11 N | 088 29 25 W |
| Ruder Airport | Airport | 260 | DeKalb | 41 56 00 N | 088 38 30 W |
| Rudolph Cemetery | Cemetery | 140 | Clinton | 38 40 03 N | 089 27 39 W |
| Rudolph Learning Center | School | 182 | Cook | 41 53 01 N | 087 40 11 W |
| Rudolph School (historical) | School | 118 | White | 38 05 47 N | 088 05 49 W |
| Rudy Cemetery | Cemetery | 213 | Edgar | 39 34 29 N | 087 47 11 W |
| Rudy School (historical) | School | 164 | Madison | 38 51 35 N | 089 37 56 W |
| Rue Vallee (subdivision) | Populated Place | 251 | Lake | 42 09 26 N | 088 03 55 W |
| Ruffled Feathers Golf Community | Populated Place | 219 | Cook | 41 39 33 N | 087 57 36 W |
| Ruffner Cemetery | Cemetery | 182 | Cumberland | 39 16 29 N | 088 04 08 W |
| Ruffner Creek | Stream | | Cumberland | 39 15 11 N | 088 05 18 W |
| Ruffner School (historical) | School | 185 | Cumberland | 39 16 13 N | 088 04 50 W |
| Rugby | Populated Place | 208 | Livingston | 40 54 43 N | 088 29 25 W |
| Rugby School (historical) | School | 210 | Livingston | 40 55 12 N | 088 29 28 W |
| Rugen Park | Park | 204 | Cook | 42 03 40 N | 087 49 55 W |
| Rugen School | School | 199 | Cook | 42 04 13 N | 087 49 05 W |
| Ruggles Elementary School | School | 179 | Cook | 41 45 08 N | 087 37 02 W |
| Ruiz School | School | 182 | Cook | 41 50 52 N | 087 40 52 W |
| Ruma | Populated Place | 135 | Randolph | 38 08 06 N | 089 59 52 W |
| Ruma Convent | Church | 153 | Randolph | 38 07 40 N | 090 00 37 W |
| Ruma Election Precinct | Civil | 150 | Randolph | 38 07 11 N | 089 59 33 W |
| Rumanian Pentecostal Assembly | Church | 183 | Cook | 41 47 10 N | 087 41 38 W |
| Rummel RLA Airport | Airport | 260 | Ogle | 42 10 00 N | 089 30 00 W |
| Rumpler | Populated Place | 207 | Vermilion | 40 06 48 N | 087 55 16 W |
| Rundown School (historical) | School | 263 | DeKalb | 41 59 09 N | 088 56 13 W |
| Runkle School (historical) | School | 202 | McDonough | 40 17 54 N | 090 37 47 W |
| Running Lake Ditch | Stream | | Union | 37 22 49 N | 089 21 24 W |
| Running Slough | Gut | 102 | Gallatin | 37 50 25 N | 088 06 05 W |
| Running Slough | Gut | 137 | Pike | 39 35 31 N | 091 09 19 W |
| Running Slough | Stream | | Gallatin | 37 45 54 N | 088 02 41 W |
| Running Slough | Stream | | Pike | 39 44 50 N | 091 15 25 W |
| Running Slough School (historical) | School | 139 | Pike | 39 41 55 N | 091 15 57 W |
| Runoff Collection Dam | Dam | 122 | Hamilton | 38 03 54 N | 088 28 36 W |
| Runoff Collection Pond | Reservoir | 122 | Hamilton | 38 03 54 N | 088 28 36 W |
| Runyan Brothers Airport | Airport | 198 | McDonough | 40 33 55 N | 090 32 55 W |
| Runyan Cemetery | Cemetery | 183 | Will | 41 36 00 N | 088 02 54 W |
| Runyon County Forest Preserve | Park | 182 | Will | 41 36 04 N | 088 02 53 W |
| Rupley Elementary School | School | 217 | Cook | 42 01 18 N | 087 59 06 W |
| Rupp Cemetery | Cemetery | 180 | Clark | 39 21 04 N | 087 53 43 W |
| Rupp Material Park | Park | 218 | Lake | 42 10 12 N | 087 58 40 W |
| Rupp Run | Stream | | Peoria | 40 45 11 N | 089 46 39 W |
| Ruppel School (historical) | School | 234 | Livingston | 40 39 29 N | 088 16 24 W |
| Rural Church | Church | 190 | Macoupin | 39 17 24 N | 089 47 21 W |
| Rural Hill | Populated Place | 173 | Hamilton | 37 57 38 N | 088 39 04 W |
| Rural Hill School (historical) | School | 180 | Hamilton | 37 57 57 N | 088 41 18 W |
| Rural Methodist Cemetery | Cemetery | 190 | Macoupin | 39 17 26 N | 089 47 21 W |
| Rural Oaks Shopping Center | Locale | 227 | Winnebago | 42 16 26 N | 089 04 01 W |
| Rural School (historical) | School | 214 | Livingston | 40 46 35 N | 088 20 10 W |
| Rural School (historical) | School | 190 | Macoupin | 39 17 23 N | 089 47 17 W |
| Rural Town Hall School (historical) | School | 227 | Rock Island | 41 22 09 N | 090 29 33 W |
| Rural Townhall | Building | 195 | Shelby | 39 28 40 N | 088 58 44 W |
| Rusche School | School | 145 | Tazewell | 40 39 27 N | 089 35 51 W |
| Rush Branch | Stream | | Champaign | 40 02 13 N | 088 04 29 W |
| Rush Cemetery | Cemetery | 174 | Fayette | 39 03 24 N | 089 13 37 W |
| Rush Center School (historical) | School | 305 | Jo Daviess | 42 25 29 N | 090 03 07 W |
| Rush Creek | Stream | | Carroll | 42 08 27 N | 090 11 01 W |
| Rush Creek | Stream | | McHenry | 42 15 23 N | 088 42 10 W |
| Rush Creek Conservation Area | Park | 283 | McHenry | 42 24 10 N | 088 35 50 W |
| Rush Northside Medical Center | Hospital | 193 | Cook | 42 03 23 N | 087 44 26 W |
| Rush Post Office (historical) | Post Office | 288 | Jo Daviess | 42 22 18 N | 090 03 03 W |
| Rush School (historical) | School | 180 | Fayette | 39 02 35 N | 089 11 40 W |
| Rush School (historical) | School | 180 | Fayette | 38 55 37 N | 088 49 29 W |
| Rush School (historical) | School | 197 | Iroquois | 40 40 40 N | 087 45 19 W |
| Rush School (historical) | School | 190 | Pike | 39 46 04 N | 090 47 59 W |
| Rush University | School | 181 | Cook | 41 52 25 N | 087 40 10 W |